Alternating current and direct current hybrid micro power grid system and control method thereof

A technology of a DC microgrid and a control method, which is applied to a single AC network with different frequencies, electrical components, etc., can solve the problems of increasing the complexity of microgrid operation and energy transmission, and achieve high-efficiency coordinated control and energy management. The effect of flexible networking and stable operation, improving power supply reliability

Active Publication Date: 2012-10-17
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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Problems solved by technology

All these characteristics add to the complexity of microgrid operation and energy transmission and use

Method used

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  • Alternating current and direct current hybrid micro power grid system and control method thereof
  • Alternating current and direct current hybrid micro power grid system and control method thereof
  • Alternating current and direct current hybrid micro power grid system and control method thereof

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Embodiment Construction

[0054] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The present invention is to provide a hybrid micro-grid system including AC and DC power supply and its control method, which fully utilizes the time-space complementarity and energy form complementarity of renewable energy generation and energy storage systems to realize flexible energy flow and improve micro-grid. The stability and economy of the power grid system provide users with efficient, stable, safe and affordable green power, and realize the efficient use of new energy and energy storage systems.

[0056] Such as figure 1 as shown, figure 1 It is a schematic structural diagram of the AC-DC hybrid microgrid system provided by the present invention. The microgrid system includes an AC microgrid system and a DC microgrid system; the AC interface of the AC microgrid system is connected to the AC busbar of t...

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Abstract

The invention relates to a micro power grid system and a control method thereof, in particular to an alternating current and direct current hybrid micro power grid system and a control method thereof. The micro power grid system comprises an alternating current micro power grid system and a direct current micro power grid system, wherein an alternating current interface of the alternating current micro power grid system is connected to a micro power grid alternating current bus; and a direct current interface of the direct current micro power grid system is connected to a micro power grid direct current bus. The scheme provided by the invention is applied to the micro power grid system which is formed by connecting various distributed new energy sources, an alternating current load, a direct current load, an energy storage system and the like through power electronic devices and a micro power grid network and operates independently, the system meets the different power requirements of users, alternating current power supply and direct current power supply are realized, and reliable power is supplied to the loads. The system contributes to the design, control, operation and maintenance of an alternating current and direct current hybrid micro grid, and the power supply reliability, economy and efficiency of the micro power grid are effectively improved by the control method of the system.

Description

technical field [0001] The invention relates to a micro-grid system and a control method thereof, in particular to an AC-DC hybrid micro-grid system and a control method thereof. Background technique [0002] Compared with traditional large-capacity thermal power generation, there are fluctuations in primary energy (such as wind energy, solar energy) and bidirectional mobility in the dynamic distribution of secondary energy in microgrids (such as bidirectional flow of energy between microgrids and large power grids, Two-way flow of energy on the bus of the energy storage unit, etc.). [0003] In addition, there are also differences in the energy transmission, usage forms, and reflection speeds of each distributed power source and load in the microgrid, and there are also characteristics such as the correlation of input energy (such as wind energy, solar energy) and the correlation of output energy (power supply). All these characteristics add to the complexity of microgrid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J5/00H02J3/02
Inventor 吴鸣苏剑刘海涛季宇李洋梁惠施
Owner CHINA ELECTRIC POWER RES INST
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